Kerio Control Box 1110, add-on, 5 users
Contents
1. 17 2 16 Secured access of remote clients to LAN 18 2 17 LAN Hosts Configuration 18 2 18 Viewing statistics of Internet usage and user browsing behavior 19 3 Configuration of the LAN in a filial office 20 3 1 Configuration of network interfaces of the Internet gateway 20 3 2 DNS configuration 20 4 Interconnection of the headquarters and branch offices 21 4 1 Headquarters configuration i 22 4 2 Configuration of a filial office 22 4 3 MPN TEST orsi ie she oad ob iena iaia atene DI A Used open source items i a a RR I e a 24 B Legal NOtICES uccise iene ei a tenes I wes 25 Chapter 1 Introduction This manual describes configuration steps to be taken for implementation of Kerio Con trol in a model network This network includes most elements present in a real life Kerio Control network Internet access from the local network protection against attacks from the Internet access to selected services on the LAN from the Internet user access control automatic configuration of clients on the LAN user authentication in the Active Directory domain user browsing behavior control etc Another issue is to provide interconnection of networks between the headquarters and a branch office by a secure encrypted channel so called VPN tunnel and secure access of clients to the local network via the Internet using Kerio Control This manual pr2. VPN clients to LAN under Con figuration Interfaces for details see chapter 4 1 No additional settings are required Communication of VPN clients is already allowed by the traffic policy created by the wizard refer to chapter 2 5 Kerio VPN Client Kerio VPN Client must be installed at each remote host to enable their connection to the VPN server in Kerio Control This application is available for Windows Mac OS X and Linux Installation files can be downloaded from http www kerio com firewall download Clients will connect to the server at the headquarters i e to 85 17 210 230 or to the server name server company com and they will be authenticated through their domain usernames and passwords see chapter 2 9 For help details see Kerio VPN Client User s Guide http www kerio com firewall manual 2 17 LAN Hosts Configuration TCP IP parameters for the hosts that are used as the domain server and as the FTP server must be configured manually its IP address must not be changed e IP address we will use the 192 168 1 2 address refer to chapter 2 6 e Default gateway use IP address of the appropriate firewall interface 192 168 1 1 e DNS server since Microsoft DNS is running on the host the system sets the local loopback address loopback 127 0 0 1 as the primary DNS server Set automatic configuration of both IP address and DNS server using DHCP at all workstations it is set
3. 7 enable the Use cus tom forwarding Define rules for the company com domain Set the IP address of the headquarter s domain server 192 168 1 2 which is used as the primary server for the company com domain as the DNS server used for forwarding Domain Network DNS server s company com 192 168 1 2 Table 4 2 Filial DNS forwarding configuration 4 3 VPN test Configuration of the VPN tunnel has been completed by now At this point it is recommended to test availability of the remote hosts from each end of the tunnel from both local networks For example the ping or and tracert operating system commands can be used for this testing It is recommended to test availability of remote hosts both through IP addresses and DNS names If a remote host is tested through IP address and it does not respond check configuration of the traffic rules or and find out whether the subnets do not collide i e whether the same subnet is not used at both ends of the tunnel If an IP address is tested successfully and an error is reported Unknown host when a corresponding DNS name is tested then check configuration of the DNS Note VPN clients connecting to the headquarters server can access both the headquarters and the branch office networks and vice versa the access is not limited by any restrictions Therefore it is recommended to test connection to both networks also from the VPN client 23 Appendix A U
4. collisions might occur and Kerio Connect may work incorrectly It is also recommended to disable also other system services which might cause collisions Universal Plug and Play Device Host and SSDP Discovery Service Now set a password for access to administration user Admi n If the installation is performed remotely e g via Remote Desktop check the corresponding option to avoid blocking of network traffic when the installation is completed Under usual circumstances a reboot of the computer is not required after the installation is completed a restart may be required if the installation program rewrites shared files which are currently in use This will install the Kerio Control Engine low level driver into the system 8 2 3 Kerio Control installation kernel Kerio Control Engine and Kerio Control Engine Monitor will be automatically launched when the installation is complete The engine runs as a service Installation of Software Appliance Kerio Control in the software appliance edition is distributed as an ISO image of the installation CD that can be used to implement the system and install the firewall on either a physical or virtual host ISO image of the installation CD can be burned on a physical CD and then the CD can be used for installation of the system on the target computer either physical or virtual In case of virtual computers the ISO image can be also connected as a virtual CD ROM without the need to bu
5. group to access pages categorized by Kerio Web Filter as Job Offers 2 Behind this rule add a rule blocking access to the same category for any other users It is recommended not to require user authentication in this rule This prevents from redirecting unauthenticated users browser to the authentication page before showing the information that the page is blocked User authentication for accessing Websites The last optional restriction is user authentication while accessing Web pages To enable this feature use the corresponding option under Users and Groups Users the Authentication Options tab User authentication is performed within redirection to the Kerio Control web interface s authentication page It is necessary that the web interface is enabled and all its parameters set correctly refer to chapter 2 8 Upon entering a valid username and password the browser will be redirected to the solicited page 2 12 FTP Policy Configuration Requirements FTP usage will be limited by the following restrictions e transmission of music files in the MP3 format will be denied e transmission of video files AVI will be denied within working hours e uploads storing files at FIP servers will be denied protection of important company information 15 Headquarters configuration FTP restrictions specified by predefined rules Go to Configuration Content Filtering gt FTP Policy to set FTP limitations The follow
6. the Rights tab Hint In case you do not want to use any of the domain accounts you can block them in Kerio Control and hide blocked accounts The accounts will be blocked only in Kerio Control they will stay active in the domain 13 Headquarters configuration 2 10 Address Groups and Time Ranges Open the Configuration Definitions Address Groups section to create IP group Email Access that will be used to limit access to email accounts refer to chapter 2 15 This group will consist of the 123 23 32 123 and 50 60 70 80 IP addresses and of the entire 195 95 95 128 network with the 255 255 255 248 network mask Note Definition of the first group requires name of the new group later additions allow selection of an existing group Likely go to Configuration Definition Time Ranges to create a time interval that will be limited to accessing Internet services during the labor hours from Monday to Friday from 8 A M to 4 30 P M Saturdays and Sundays from 8 A M to 12 A M You can use predefined day groups Weekday or Weekend to define the Valid on entry it is not necessary to tick each day individually 2 11 Web Rules Definition Requirements Access to Web pages will be limited by the following restrictions e filtering of advertisements included in web pages e access to pages with erotic sexual content is denied e access to Web pages that offer jobs is denied only users working in Personal Departmen
7. Kerio Control Step by Step Guide Kerio Technologies 2010 Kerio Technologies s r o All rights reserved This guide provides detailed description on configuration of the local network which uses the Kerio Control version 7 1 All additional modifications and updates reserved For current version of the product go to http www kerio com firewall download For other documents addressing the product see http www kerio com firewall manual Contents 1 Introducti zii lai aa ali aa ea O ale e i ia 4 2 Headquarters configuration iii 6 2 1 Selection of IP addresses for LAN rr rrrrrrnrn 6 2 2 Configuration of network interfaces of the Internet gateway 7 2 3 Kerio Control installation 8 2 4 Kerio Control Administration interface and product activation 10 2 5 Setting connection and basic traffic rules 10 2 6 DHCP Server Configuration 11 2 7 DNS configuration 12 2 8 Web interface and SSL VPN certificates serron rnern rnr 12 2 9 Mapping of user accounts and groups from the Active Directory 13 2 10 Address Groups and Time Ranges rnrn rrr 14 2 11 Web Rules Definition 2 2 06660 14 2 12 FTP Policy Configuration 15 2 13 Antivirus Scanning Configuration 16 2 14 Intrusion Prevention System 17 2 15 Enabling access to local services from the Internet
8. all including a host operating system Compared with the Windows edition on the same hardware this version offers higher performance and network throughput It also guarantees no collisions with incompatible applications and system services However no other applications can be hosted on the same system along with the firewall For virtualization systems VMware and Parallels virtual appliances are ready available for import and instant startup Kerio Control Box hardware device This box consists of Kerio Control in edition Appliance installed on a special optimized hardware device In smaller networks it can be also used as a switch for connection of local stations The Kerio Control box is available in two types different in performance and number of network ports Chapter 2 Headq uarters configuration This chapter provides detailed description on configuration of the local network and setup of Kerio Control in company headquarters The same procedure can be applied for network configuration in a branch office bearing in mind slight differences described in chapter 3 For purposes of this example it is supposed that an Active Directory domain company com is created in the headquarters LAN and all hosts in the network are included in this domain 2 1 Selection of IP addresses for LAN In our example we will focus on private networks connected to the Internet through a single public IP address Under such circumstances the
9. atistics see the Kerio StaR s main page with overall statistics upon their logon to the web interface Other users see the web interface welcome page first By default the web interface is available from the LAN To make it available from the Internet it is necessary to define a corresponding traffic rule see chapter 2 15 Detailed information addressing the Kerio Control web interface and Kerio StaR is provided in the Kerio Control User s Guide available at http www kerio com firewall manual 19 Chapter 3 Configuration of the LAN in a filial office For quick configuration of the filial s LAN it is possible to follow similar method as for the headquarter s network see chapter 2 The only difference is in DNS configuration Supposing that there is no domain server or any other DNS server in the filial s network The Kerio Control s DNS module will be used as the primary DNS server 3 1 Configuration of network interfaces of the Internet gateway Set a fixed IP address e g 10 1 1 1 at the firewall s interface connected to the local network Make sure that no default gateway is set on this interface No DNS server should be set here as well Follow the ISP s instructions to set the interface connected to the Internet 3 2 DNS configuration In Configuration DNS keep the default settings the DNS forwarder service and simple DNS translation with the hosts file and a table of leased addresses are allo
10. be installed first The Sophos antivirus application is integrated into Kerio Control and you will need a special license to run it The ideal solution is to combine the integrated and an external antivirus so called dual antivirus check In Configuration Content Filtering Antivirus on the Antivirus tab set antiviruses and if applicable also advanced settings for the selected external antivirus For complete list of supported antiviruses and their detailed configuration guides refer to http www kerio com firewall third party av 16 2 14 Intrusion Prevention System Kerio Control allows to select protocols which antivirus check will be applied to The HTTP FTP scanning Email scanning and SSL VPN scanning tabs enable detailed configuration of scanning of individual protocols Usually the default settings are convenient 2 14 Intrusion Prevention System In Configuration Traffic Policy Intrusion Prevention enable detection of known types of network intrusions coming from the Internet and from known intruders The default setting is optimized and it is usually not necessary to change it However it is recommended to check Security regularly and evaluate possible false alarms For details see Kerio Control Administrator s Guide http www kerio com firewall manual 2 15 Enabling access to local services from the Internet Go to Configuration Traffic Policy gt Traffic Rules to add rules for ser
11. by default under most operating systems 18 2 18 Viewing statistics of Internet usage and user browsing behavior 2 18 Viewing statistics of Internet usage and user browsing behavior Kerio Control also includes a web interface called Kerio StaR statistics and reporting which allows to view user browsing behavior as well as statistics in tables and charts The monitored activity items include e visited websites e email messages and instant messaging e large file transfers e multimedia online audio and video streaming e remote access terminal access and VPN connection Tables and charts are available for the following statistical issues e volume of transferred data e used protocols services e top visited web domains e top requested web categories Statistics can be either showed for the overall traffic or for individual users Access and authentication to the statistics Internet usage statistics may include fragile information For this reason a special right is used for access to this information assigned only to the Admin by default Therefore it is first necessary to grant rights for statistics viewing to specific users and or groups under Users and Groups Statistics are available via the Kerio Control web interface You can enter the web interface at the URL following this pattern https lt firewal1 gt 4081 which is in our example https server company com 4081 Users with rights to view st
12. ers and other offices and for connection of remote clients see chapter 4 Clientless SSL VPN remote access to shared folders and files in the network via web browser and Kerio Control Administration remote administration of Kerio Control e Mapping other services add SMTP service mapping on the firewall In this step you can also define mapping for other hosted services such as an FTP server This will be better understood through the second method custom rule definition For details see chapter 2 15 Note There is no reason for allowing any services on firewalls of branch offices branch office servers use dynamic IP address 2 6 DHCP Server Configuration Go to the Configuration gt DHCP server section in the Kerio Control Administration interface Connectivity wizard set the DHCP server in auto config mode Therefore it is not necessary to define other information than desired reservations In the upper part of the window Scopes click on the local network scope and in the lower part of the window Leases and Reservations add reservation for network printer The address you reserve need not necessarily belong to the scope described above however it must belong to the specified network in this example the 192 168 1 3 address is reserved You need to know the hardware MAC address of the printing machine to make the reservation 11 Headquarters configuration Hint Do not make the reservation manually unl
13. ess you know the MAC address of your printing machine Run the DHCP server and connect the machine to the network An IP address from the formerly defined scope see above will be assigned to the printing machine In the list of leased addresses mark this IP address and click on Reserve This opens a dialog for IP address reservation with the corresponding MAC address already predefined Change reserved IP address to the desired one 192 168 1 3 edit the description and click on OK Restart your printing machine The appropriate IP address will be assigned to the printing machine by the DHCP server after the restart Note You can also use another DHCP server to detect settings of your network equipment automatically Set the firewall computer s internal IP address 192 168 1 1 as the default gateway and DNS server in parameters for this range on the DHCP server In this case it is necessary to keep the DHCP server in Kerio Control disabled 2 7 DNS configuration In Configuration DNS keep the default settings the DNS service and simple DNS translation with the hosts file and a table of leased addresses are allowed and set the advanced options e Enter the local DNS domain name company com e Enable the Use custom forwarding option Add the rule for forwarding of requests to the Active Directory i e of all requests for names starting with _ underscore to the domain server in the LAN This setting is required for correct co
14. example name server company com is used For access to Kerio Control interfaces from the Internet a record for this name must exist also in public DNS Hint It is recommended to replace the created SSL certificates by an SSL certificate issued by a public certification authority one certificate can be used both for the web interface and the Clientless SSL VPN interface there is no need to pay for two certificates 2 9 Mapping of user accounts and groups from the Active Directory To enable disposal of Active Directory user accounts set mapping of a corresponding domain and define a template that will apply specific Kerio Control parameters user rights data transfer quotas etc to all users Domain mapping To set Active Directory domain mapping go to the Active Directory tab under User and Groups Users The firewall must belong to the corresponding domain For mapping of user accounts enter name and password of a user with rights to read the Active Directory database any user belonging to the domain Creating templates for user accounts On the User Accounts tab select the mapped Active Directory domain i e company com If mapping is set correctly all user accounts included in the domain will be displayed here Click on the Template button to define a template for user accounts It is also intended to enable remote users to access the local network by Kerio VPN Client or Kerio Clientless SSL VPN Set user rights on
15. f configuration of a network with assigned IP addresses 21 Interconnection of the headquarters and branch offices The headquarters uses IP addresses 192 168 1 x with the network mask 255 255 255 0 and with DNS domain company com The branch office uses IP addresses 10 1 1 x with network mask 255 255 255 0 and with the subdomain filial company com 4 1 Headquarters configuration In Kerio Control under Configuration Interfaces select a VPN server open its settings dialog and enable it Note The VPN network and Mask entries now include an automatically selected free subnet for VPN There is no reason to change the network Use the Edit SSL certificate button to create an SSL certificate with the name of the corresponding server e g server company com This certificate is used for identification of the VPN server Note It is recommended to later replace this generated certificate with a certificate authorized by a reliable public certification authority Create a passive endpoint of the VPN tunnel the office s server uses a dynamic IP address therefore there must be the active endpoint of the tunnel at the office Specify the remote endpoint SSL certificate s fingerprint by the fingerprint of the certificate of the branch office VPN server In the configuration of the DNS module refer to chapter 2 7 enable the Use custom for warding Define rules for the filial company com domain Specify the server for DNS fo
16. figuration of TCP IP parameters by using DHCP protocol In case of manual configuration the following parameters are required for proper functionality of the Internet interface IP address subnet mask default gateway and at least one DNS server s address The web interface of the company headquarter s firewall should have a fixed IP address to make it possible for the filial s server and VPN clients to connect to it see requirements in chapter 1 Suppose that the ISP has assigned IP address 85 17 210 230 It is also recommended to assign a DNS name e g server company com to this IP address otherwise all VPN clients will be required to define the server by the IP address Verify connectivity i e by using the ping command or by opening a Web site using your browser LAN Interface The following parameters will be set at the LAN Interface e IP address we will use the 192 168 1 1 IP address refer to chapter 2 1 e network mask 255 255 255 0 e default gateway no default gateway is allowed at this interface e DNS server no DNS server should be set on this interface 2 3 Kerio Control installation Install Kerio Control by following the procedure corresponding with your server type Installation on Windows Run the Kerio Connect installation file Select Full installation If the installation program detects the Internet Connection Sharing service it is recommended to strictly disable this service otherwise
17. ing rules are predefined rules and can be used for all intended restrictions e Rules Forbid mpg mp3 and mpeg files and Forbid upload are ready to use e Modify the Forbid avi files rule by going to the Advanced tab and setting the time when the rule is valid in the Working hours range see chapter 2 10 FTP server in local network M the following example we intend to enable the local FTP server from the Internet The Forbid upload rule denies even upload to this server which is not always desirable For this reason we must add a rule that would enable upload to this server before the Forbid upload rule e On the General tab set the following condition if any user accesses FTP server 192 168 1 10 then allow e On the Advanced tab set the operation type to Upload and use the wildcard for any file Notes 1 The IP address of the host where the appropriate FTP service is running must be used to define the FTP server s IP address It is not possible to use an outbound IP address of the firewall that the FTP server is mapped from unless the FTP server runs on the firewall IP addresses are translated before the content filtering rules are applied 2 The same method can be also applied to enable upload to a particular FTP server in the Internet whereas upload to other FTP servers will be forbidden 2 13 Antivirus Scanning Configuration Any supported external antivirus application that you intend to use must
18. ing to set basic parameters of the firewall network interfaces time and time zone etc Other parameters can be set remotely in the Kerio Control Administration web interface Installing Kerio Control Box Use the power cable to connect Kerio Control Box to a power supply unit Connect the first port port number 1 to the Internet i e connect it to the router cable modem ADSL modem etc and the last port number 4 or 8 depending on the model to the local network or directly to the computer from which you will perform initial configuration Start the device and the computer used for its administration and connect to the Kerio Control Administration web interface at the default IP address of the device 10 10 10 1 To see how to install Kerio Control Box refer the Kerio Control Box Installation guide delivered in the product package 2 4 Kerio Control Administration interface and product activation In your web browser Internet Explorer Firefox or Safari open the Kerio Control Administration web interface This interface is available at the local IP address of the firewall i e in this example at https 192 168 1 1 4081 admin Upon the first connection to this interface product activation wizard is started automatically This wizard allows to e Register the product with the purchased license number e Import the license key file 1icense key saved from the previous installation e Register trial versio
19. local network will be hidden behind this IP address entirely Local networks which do not belong to the Internet so called private networks use reserved special ranges of IP addresses These addresses must not exist in the Internet Internet routers are usually set in order to drop all packets that include these addresses The following IP ranges are reserved for private networks 1 10 x x x network mask 255 0 0 0 2 172 16 x x network mask 255 240 0 0 3 192 168 x x network mask 255 255 0 0 Warning Do not use other IP addresses in private networks otherwise some web pages those networks that have the same IP addresses might be unavailable For the headquarters LAN the private addresses 192 168 1 x with subnet mask 255 255 255 0 IP subnet 192 168 1 0 will be used whereas IP addresses10 1 1 x with subnet mask 255 255 255 0 IP subnet 10 1 1 0 will be used for the filial s LAN Setting IP addresses in an example network The following methods can be used to assign IP addresses to local hosts e The 192 168 1 2 static IP address will be assigned to the domain server FTP server its IP address must not be changed otherwise mapping from the Internet will not work e A Static IP address will be assigned to the network printer by the DHCP server DHCP lease Printing machines cannot have dynamic IP addresses otherwise they would be unavailable from clients if the IP changes 6 2 2 Configuration of network inte
20. mmunication of local computers with the domain server DNS name Forward to DNS servers 192 168 1 2 Table 2 1 Rule for forwarding of DNS requests to Active Directory It is also necessary to add rules for correct forwarding of DNS queries between the headquarters network and networks of branch offices For detailed description on these settings refer to chapters 4 1 and 4 2 2 8 Web interface and SSL VPN certificates The Kerio Control web interface allows remote administration of the firewall via a web browser Kerio Control Administration and viewing of Internet usage statistics Kerio StaR It also allows viewing of information regarding attempts to access forbidden web pages see chapter 2 11 and users can use it to set several parameters of their accounts The Clientless 12 2 9 Mapping of user accounts and groups from the Active Directory SSL VPN interface is used for secured remote connections to shared files in local networks by a web browser For proper functionality of web services an SSL certificate is required that proves the server s identity To create certificates for web interfaces go to Configuration Advanced Options to the Web Interface or the SSL VPN tab In advanced settings of individual interfaces select Change SSL certificate and Create certificate The server name for which the certificate will be issued should be identical with the server name including domain in our
21. n registration allows to test Kerio Web Filter and update the integrated antivirus and the intrusion prevention system e Activate unregistered trial version Upon successful activation you will be asked to enter the main firewall administrator s Admin password This username and password will then be required for authentication at the Kerio Control Administration interface 2 5 Setting connection and basic traffic rules Login to the Kerio Control Administration interface use username Admin and the password defined in the product activation wizard Upon the first logon the Configuration Assistant dialog is displayed automatically 10 2 6 DHCP Server Configuration Connectivity Wizard First run the Connectivity Wizard the first link in the Configuration Assistant Set the following parameters using the Wizard e Internet connection types the wizard page 1 select persistent connection with a single Internet line e Internet interface the wizard page 2 select an adapter connected to the Internet e Interface for the local network the wizard page 3 select an adapter connected to the local network Network Rules Wizard Once connectivity is configured run the Traffic Policy Wizard the second link in the Configu ration Assistant Set the following parameters using the Wizard e Access to Kerio Control services enable all the services Kerio VPN for connection of networks in the headquart
22. ovides guidelines for quick setup Detailed information addressing individual Kerio Control features and configuration instructions are provided in the Kerio Control Administrator s Guide available at http www kerio com firewall manual Network configuration example Kerio Control configuration will be better understood through an example of a model network shown at figure 1 1 Network 4 Printer 15 N 2 VPNclient f Kerio Control Kerio Connect Workstation Domain controller FTP server LAN Figure 1 1 Network configuration example 4 It is recommended to reserve a standalone server for the firewall s purposes Internet gateway Such server can be A physical or virtual server with Windows Use Kerio Control in a Windows edition installed in the system as an application The firewall can be run along with other server applications such as the mailserver with groupware features Kerio Connect However the firewall host should not be used as a user workstation Implementation on a server with Windows is suitable especially in minor networks where only one server is available or if you want to use Kerio Control to replace an existing software firewall or proxy server A physical or virtual server without operating system If there is a physical or virtual server reserved where no other applications will be run it is recommended to use the Kerio Control s Appliance edition which provides firew
23. rfaces of the Internet gateway Note IP addresses can be assigned to printers either manually or by a DHCP server If a DHCP server is used the printing machine is configured automatically and its address is listed in the DHCP lease list If configured manually the printing machine will be independent of the DHCP server s availability e Dynamic IP addresses will be assigned to local workstations easier configuration Kerlo Control Kerio Connect Workstation Domain controller FTP server Figure 2 1 Example of configuration of a network with assigned IP addresses Notes 1 The DNS domain in the LAN must be identical with the Active Directory domain i e company com 2 IP addresses 10 1 1 x with the subnet mask 255 255 255 0 will be used in the network of the branch office The Active Directory domain is not used in this network so it is necessary to create a local DNS domain filial company com 2 2 Configuration of network interfaces of the Internet gateway Internet gateway is a host or a server at the boundary of LAN and the Internet In this example a server with Windows will be used The Kerio Control firewall see chapter 2 3 as well as Kerio Connect will be installed on this server Kerio Connect will be used as a mailserver and groupware server Headquarters configuration Internet Interfaces Follow the ISP s instructions to set the interface connected to the Internet Most ISP use automatic con
24. rn the installation ISO file on a CD After installation the computer will be rebooted and a simple wizard for setting of the following basic firewall parameters will get started network interfaces remote administration Admin passwords etc Any other settings can be done remotely in the Kerio Control Administration web interface VMware Virtual Appliance installation Use a corresponding package in accordance with the type of your VMware product see above e Incaseof products VMware Server Workstation and Fusion download the compressed VMX distribution file zip unpack it and open it in the your VMware product e You can import a virtual appliance directly to VMware ESX ESXi from the URL of the OVF file for example http download kerio com dwn contro1 kerio control appliance 7 1 0 1234 linux ovf VMware ESX ESXi automatically downloads the OVF configuration file and a corresponding disk image vmdk Upon the first startup of the virtual host a simple wizard is opened allowing to set basic parameters of the firewall network interfaces time and time zone etc Other parameters can be set remotely in the Kerio Control Administration web interface Installing Virtual Appliance for Parallels Download the distribution package in Zip Zip unpack it and open it in the corresponding Parallels product Headquarters configuration Upon the first startup of the virtual host a simple wizard is opened allow
25. rwarding by the IP address of the remote Kerio Control host s interface i e interface connected to the local network at the other end of the tunnel Domain Network DNS server s filial company com 10 1 1 1 Table 4 1 Headquarters DNS forwarding configuration 4 2 Configuration of a filial office 1 In Kerio Control under Configuration Interfaces select a VPN server open its settings dialog and enable it Note The VPN network and Mask entries now include an automatically selected free subnet for VPN There is no reason to change the network Use the Edit SSL certificate button to create an SSL certificate with the name of the corresponding server e g server filial company This certificate is used for 22 identification of the VPN server The fingerprint of the created SSL certificate will be required for definition of the VPN tunnel on the headquarters server see chapter 4 1 Select it copy it to the clipboard and paste it to an email message text file etc Note It is recommended to later replace this generated certificate with a certificate authorized by a reliable public certification authority 2 Create an active endpoint of the VPN tunnel which connects to the company s headquarters server server company com The fingerprint of the VPN server certificate can be set simply by clicking on Detect remote certificate 3 Im the configuration of the DNS module refer to chapter 2
26. sed open source items Kerio Control contains open source software Full source code packages for these components are available in the Software Archive at http download kerio com archive 24 Appendix B Legal Notices Microsoft Windows Windows NT and Active Directory are registered trademarks or trademarks of Microsoft Corporation VMware is registered trademark of VMware Inc Other names of real companies and products mentioned in this document may be registered trademarks or trademarks of their owners 25
27. ts are allowed to access these pages e user authentication will be required before access to the Internet is allowed this way you can monitor which pages are opened by each user Ads filtering and blocking access to specific website categories The following basic HTTP rules are already predefined and available in the URL Rules tab in Configuration Content Filtering gt HTTP Policy e It recommended to keep rules Allow automatic updates for Kerio software and Allow automatic updates and MS Windows activation enabled Otherwise automatic updates of Kerio Control and of the server s operating system might stop working correctly e Rules Allow popular search engines and Remove advertisement and banners can be used according to your needs e Rule Deny sites rated in Kerio Web Filter categoriescan be used to block all users access to pages with erotic contents 14 2 12 FTP Policy Configuration Use the Select Rating button to select Kerio Web Filter categories that will be blocked Then select appropriate categories in the Pornography Nudity section to deny access to pages with erotic sexual content On the Advanced tab enter the text which will be displayed if a user to access a page with forbidden content or set redirection to another webpage Restrictions of web pages with job offers To restrict access to websites with job offers use the following rules 1 Adda rule allowing users from the Human Resources Department
28. vices that will be available from the Internet Rules for service mapping should be always at the top of the traffic rules table e Mapping of local FTP server unsecured access only is supposed which makes it possible to filter traffic and scan it for viruses Name Source Destination Service Action Translation Access to FTP server Any Firewall FTP Allow Mapping 192 168 1 2 Table 2 2 Making the local FTP servers available from the Internet e Access to other mail server services save SMTP allowed only from certain IP addresses in the Working hours time range Name Source Destination Service Action Translation Valid in Access to email Group Access Firewall IMAP Allow Working hours to email IMAPS POP3 POP3S Table 2 3 Enabling access to the firewall s mailserver services Notes 17 Headquarters configuration 1 This rule enables access to IMAP and POP3 services in both encrypted and unencrypted versions client can select which service they will use 2 Based on this example the SMTP service was mapped by the traffic rules Wizard refer to chapter 2 5 the appropriate rule already exists 3 Access to the SMTP service must not be limited to certain IP addresses only as anyone is allowed to send an email to the local domain 2 16 Secured access of remote clients to LAN Enable the VPN server for secured access of remote clients
29. wed and set the advanced options e Enter the local DNS domain name filial company com e Enable the Use custom forwarding option The settings are addressed in details in chapter 4 2 e It is recommended to add a record about the server or about other hosts to which a fixed IP address will be assigned to the hosts file 10 1 1 1 server 20 Chapter 4 Interconnection of the headquarters and branch of fices This chapter provides information on interconnection of headquarters and branch office servers by an encrypted channel VPN tunnel The following example describes only the basic configuration of a VPN tunnel between two networks No tips related to access restrictions or other specific settings are included here For example of a more complex VPN configuration refer to the Kerio Control User s Guide document The configuration consists of two parts settings in the headquarters and settings of the filial It is supposed that both networks have been already configured as described in chapter 2 and that connection to the Internet is available Information related to the example For better reference review the figure providing a graphical description of interconnected networks including their IP addresses Company Headquarters Workstation Network j m Printer 5 E CA a al VA VPN client Kerio Control Kerio Connect Branch Office I FTP server Figure 4 1 Example o
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